<!DOCTYPE html>
<link rel="help" href="https://drafts.csswg.org/css-properties-values-api/#calculation-of-computed-values" />
<link rel="match" href="/css/reference/ref-filled-green-100px-square-only.html">
<style>
  @property --a {
    syntax: '<color>';
    inherits: true;
    initial-value: green;
  }

  body {
    --a: 1em;
  }

  div {
    width: 100px;
    height: 100px;
    background-color: var(--a);
  }
</style>
<p>Test passes if there is a filled green square.</p>
<div></div>
